This is another great David Dixon filter design that has been on the workbench for a while. It is a very clean and precise filter that also doubles as an excellent sine VCO.

It responds very well to FM and the small size should make it a nice choice for smaller systems/lunchboxes.

low pass (LPF) 2-pole , high pass (HPF) 2-pole and bandpass outputs (BPF) 1-pole.
FM1 input acts as 1V/Oct when full CW tracks very well over 4+ octaves
FM2 input has a bipolar attenuator
At full Q you get very low distortion sinewaves with a range of 2Hz to 20Khz

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